Search International and National Patent Collections

1. (WO2013120048) METHODS AND APPARATUS FOR ESTIMATING USEFUL LIFE OF A SEAL

Pub. No.:    WO/2013/120048    International Application No.:    PCT/US2013/025486
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Tue Feb 12 00:59:59 CET 2013
IPC: F16J 15/06
F16K 37/00
F16K 41/00
G01M 13/00
G05B 23/02
Applicants: FISHER CONTROLS INTERNATIONAL LLC
Inventors: ANDERSON, Shawn, W.
Title: METHODS AND APPARATUS FOR ESTIMATING USEFUL LIFE OF A SEAL
Abstract:
Methods and apparatus for estimating useful life of a seal in a process control device are disclosed. An example method includes establishing a plurality of travel ranges of a stem or shaft of a process control device. Each travel range corresponds to different values corresponding to stresses experienced by the seal of the process control device during an operational cycle. The example further includes determining a count of operational cycles associated with each of the travel ranges and estimating a total amount of useful life of the seal consumed based on the counts.